Combination bevel



Dec. .28, 1948.

w. THOMAS COMBINATION BEVEL 2 sheets-sheet 1 Filed Feb. 9, 1945 l IUDDEVGREES 4d 57 Dec. 28, 1948.

Filed Feb. 9, 1945 w. THOMAS COMBINATION BEVEL li l l l//// /74 2sheets-shet 2 grund/who@ William 'f1/20 77u23 5W @www4 Patented Dec. 28,1948 UN I TED S TATEFS PATE-N T 'FFl-CIE ,2,457,613 COMBINATION BEVEL-Willuiam Thomas, eddiwe, alif; -Applieaiien February 9, 1945,sere1Ne.577,;00'3- 1 claim. (C1. s-ts) Figure :1 .isffa view in elevation.showingth im- Aproved;ccmbiuatiori bevel.

VFigure .2 isan edge'view of the .bevel looking from 'the' left ofFigure I, with thetongue folded and witnthe accessories removed.

Figure .3 Vis a vertical `sectiori'al view rt'akenon the line 3&3ofiFigure 1.

lFigure 4' vis .a vertical sectional view taken on Figure 5 isahorizontal `sectional view v:talren on theiine 5*-*f5fof Figure 1.

Figure .-6 .is a horizontal sectional View taken on the line 8-6 ofFigure 1.

Figure '7 is an elevation of one of the plates of the stock.

Figure y8 is an end elevational view ,of the peep sight.

Figure 9 is a detailed elevation of the pivoted end ofthe body andtongue showing the loi-sector arm in position thereon and Figure 10 is afragmentary detail of the fo'pposite side of fthe pivoted tongue showingliowlo'th sides thereof forma protractor.

Referring spec'i'ii'c'all'y t`o` the drawings wherein like referencecharacters designate their like' or similar parts throughout thedifferent views, a stock is employed at SI'0`-. This Stock or body iscomposed of a pair of plates tI and IZ secured together in slightlyspaced relation by means of rivets or the like I3 passing therethroughat one end and through spaced element I4 located between such plates.The side edges of the plates II and I2 are straight and parallel. Thoseof the respective plates register with each other as shown. Plate IIalong its opposite longitudinal edges preferably has integral outwardlyextending iianges I5, while the plate I2 has similar anges at I6.

On the outer surface of the plate I2 are provided scales as at I1, I8,I9, 2l), 2|, 22, representing respectively, sines, rises, degrees,secants,

:onrthe pivotzafforded by bolt accessoiyv in the lforni of al 2.hypote'nuses and inches.` may-provide' scales :also to represent forinstance cosines, 4versed sines,` etc. At .the same time; it is to be`understood lthat' the particular arrang?A .ment oi the location' of thedifferent scales may be V'ari'ed and such scales `placed lat any feasillocation or locations on .the stockV or .bod-y.

Coactingl'wth the stock l' body @rid Sis a'fblad On 'the Outer face `I`or tongue. 23 havingan enlarged end 2'4 'secured between the freeendsof tneplatesm and -I2=and pvotally mounted on a screw 15 passingthrough the plate at portion Myhaviin'g a headGI/and a nut 21-threadedon the bolt 01S`Ci'Wand'a'daptd `to hind against 4the plateIrI'. The nut 21 lwill ,fbi-ndftl'ie' parts togetherior .hold them withsumc'ient friction -to maintain the tongue in different vadjustedp'ositionsfor Vat different angles, while -it may be Aloosened :toenable the tongue to swing 25, toa folded posi-- tion between-the plates`III and AI2 as suggested by -the dotted line-inFigure 1.

Enlargement 2t has .anV .arcuate edge so that degree indications may bedelin'eatedthereon and 28and 28a on opposite sides of thetn'gue-t'oforni a protractoronbth sidesthereo'f.

Said tongue 23 it will beV noted has 'parallel straight edges Aalongywhich scales are provided as at 29, .30 :to .des-ignatedegree's and thelength of arcs- .of predetermined zr'adii. Any yo'tlfrerlarrange'- mentof scales may be resorted to with respect to :the tongue.

Inconn'ection with' thet'ongue'l vprovide a nvel peep' sight generallyidesignated .at :3.I. This sight isin the' forni of an'- .elongated tubewhose wall is opar'me,V and which tube isnclosednat the-viewing end withthe exception or a small central opening 32 while fat .the lother enda;I freticuleor crossed wires 33 are provided'. Integral' with ror rigidon fthe tubew3l are ciasp'- fingers or adapted` Africtionaily' tognpopposite sides ofY the `tongue 123, since theyfre resilienay and dnefofwhich fingers has anfinwald- :ly' extending Flug or ribf-detachablyengaged .in a groove 36. It is clear that the peep sight is detachablyengaged in this manner with the tongue.

Horizontal spirit levels 41 and 48 are mounted on the opposite sides ofthe peep sight 3| and a third horizontal spirit level 49 is mounted ontop of the peep sight. Vertical spirit levels 50 and 5I are also mountedon opposite sides of the peep sight.

Reverting to the stock I 0, at specically the plate I I, a centrallongitudinal slot 31 is provided.

Detachably slidable in the slot 31 are T-shaped heads or supports 38,39and 40 respectively,`

for a plumb level 4I, an indicator 42 and a horizontal level 43.

heads 38, 39 and 4I] are of the same width as the slot 31 to enableinsertion or removal therelengt-h so as to` underlap and frictionallyengage plates II and through, but that they are of a I2 when turned outof alignment With the slot 31. Such heads 38, 39 and 4D will be held byfrictional pressure or clamp action between plates I I and I2 when thenut 21 is tight. The pressure It will be noted that the` by addition orsubtraction of this reading With will be released upon loosening nut 21to enable` l more rapid manipulation of the levels 4I and 43' andindicator 42.

As another accessory, I may employ a bisector arm 44 suitably calibratedif desired as at 45 to provide a linear measure, and one of whosestraight longitudinal edges as at 46'intersects the the reading obtainedon the base line, the angle formed by the base line can be obtained. Bymeasuring the length of the base line, it is possible to ascertain thehypotenuse or length of the guy line and rise or height of the stack tothe point Where the guy line connects therewith, by reading thehypotenuse and rise for a corresponding angle having a one foot base onthe scales and by multiplying by the number of feet that the base linemeasures.

axis of the bolt 25. This bsector arm is of rela-` tively thin materialand it has an opening at a point intermediate of its ends through whichbolt 25 may pass, enabling detachable application of` the bisector armon the bolt between plate I I and the nut 21, the latter being operableto clamp the `bisector arm at a desired angle or position. The arm 44may be utilized with the stock Il] as a secondary bevel, employing theedge 46 of the shorter end of the arm 44 as an index line for Atheprotractor graduations 28, for positioning the arm 44 at any desiredangle-to the stock I0.

The bevel or tool described may be used in laying out plates, sheets,structural steel, buildings, etc., and for auxiliary uses such as layingout claims for prospectors, temporary surveys, nding altitudes and thelike. The calibrationsvon the stock are so arranged that when the angleis found on the protractonall that is necessary is to read off thechord, ordinate, arc, sines, versed sines, cosines, tangents, secants,rises, and lhypotenuses opposite the degreernarked on the tongue. Thearrangement enables the obtaining of the length of hypotenuses, rises,arcs, chords, and ordinates as in my prior, Patent No. 2,292,094. Whenthe device is used with the peep sight 3I attached it will be realizedthat-the stock or body III is disposed vertically andthe tongue arrangedat any desired angle, with the engineer or kartisan sighting through theopening 32 rin combination with the reticule or crossed wires at One ofthe numerous uses of the instrument is in the obtaining of thehypotenuse and rise of a large triangle, such as formed by an inclinedguy wire, a stack and a base line, between'the anchored baseend of thebuy line and the base of the stack. The peep sight can be employed tosight along the base line and by utilizing the spirit level 4I, thestock I0 can be maintained perpendicular or with the level 43 can bemaintained horizontally. By adjusting the blade, the

sight 3| can'be aligned with the base line, thus aligning the bladetherewith so that the incline or decline of the base line can be readonthe Obviously, the levels may be either single or double and the slotsfor the levels may be on one side or both sides. The pointer may gothrough oney or both sides ,ofy the device. The openings may be of anyshape, such as round or square or rectangular, maybe made suchasincombination bevels to accommodate telescope clips. 1

Various changes may be resorted to provided they' fall within the spiritand scope ofwthe invention.

Having thus described the invention, what I claim is:

. An instrument of the class described comprising a stock, a tonguepivotally connected thereto and coacting therewith to form a bevelincluding a protractor, a peep sight carried by the tongue, a spiritlevel carried bythe peep sight, said tongue having a longitudinal groovein one side thereof, disposed parallel to its longitudinal 'edges andopening outwardly of its free end, and s`aid peep sight having a bracketcomprising spaced, substantially parallel arms disposed perpendicular toits axis for engaging opposite sides of the tongue, one of said armshaving an inturned free end for close tting engagement with the groovefor detachably mounting the peep sight on theY tongue and in parallelrelationship thereto.

WILLIAM THOMAS.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Name f Date Reichenbach May 11, 1886 Nilson Mar.27, 11900 Peer Apr. 17, 1945 FOREIGN PATENTS 'Number Number

